Swim bladder Blood flow 100 Air diffusion 100 Gas gland 110 Rete mirabile 100 Air concentration 70 100 120 120-110 100 70 90 120 120 110 100 100 200 210 140 150 160 170 180 190 200 210 220 220-210 200...

(1) Please examine the figure below, depicting a portion of the rete mirabile associated with the gas bladder of two fishes:

(a) One of these diagrams references a shallow water fish and the other references a deep water fish. Which diagram belongs to which type of fish? How can you tell?

(b) Many deep water fish lack swim bladders altogether! Why do you think this is? What does the presence of a swim bladder in the above deep sea fish suggest about its behavior?

Extracted text: Swim bladder Blood flow 100 Air diffusion 100 Gas gland 110 Rete mirabile 100 Air concentration 70 100 120 120-110 100 70 90 120 120 110 100 100 200 210 140 150 160 170 180 190 200 210 220 220-210 200 . 150 160 170 180 190 200 210 220 220 210 200